图解法分析自聚焦透镜的物像关系

Using Schematic Method to Analyse Imaging of the Selfoc Lens

从自聚焦透镜的成像特性出发,导出了自聚焦透镜与普通透镜相同的高斯物像公式。采用理想光具组图解法分析了自聚焦透镜子午光线的成像。该成像法只需要找出基点、基面的位置,利用两条特殊光线,便可以在确定物体具体位置和高度的情况下通过图解法,得出像的具体位置和大小。对直径为1．82 mm的自聚焦透镜的物像关系进行了实验研究,结果表明图解法能够很好地分析自聚焦透镜成像。

According to the selfoc lens imaging properties,the Gauss image formula of the selfoc lens is deduced. The meridian beam image of the selfoc lens is analyzed by using the ideal schematic method. The position and the size of the image is obtained by using the schematic method. The image properties are researched in the test with diameter of 1.82 mm. The experimental results are coincident with the theory.